The disciplinary case against one of Britain's best-known and most controversial IVF doctors collapsed yesterday.

Mohammed Taranissi, who runs the Assisted Reproduction and Gynaecology Centre (ARGC) in central London, was accused of mistreating two of his female patients. He faced disciplinary action from the General Medical Council which could have seen him stripped of his licence to practise medicine.

But yesterday, after sitting for several weeks, a GMC fitness to practise panel ruled that allegations against Taranissi did not amount to misconduct and decided there was insufficient evidence to continue the case.

In a statement issued through the Science Media Centre, Taranissi said: "I am delighted that this case has collapsed. I have been put in a situation where I have had to defend myself against inaccurate allegations." He added: "I felt I would be letting down my staff and the patients who believe in me if I did not fight the various false allegations."

The panel chairman, Dr Harvey Markovitch, said: "Although the panel concluded that on the evidence, taken at its highest, there was sufficient evidence to find that Mr El-Taranissi failed to keep a note of one consultation, and this conduct was capable of falling below the standard expected of a registered medical practitioner, it was incapable of amounting to misconduct. The panel concluded that In those circumstances it would not be aided by hearing further evidence."

Taranissi was accused of failing to keep proper medical records, behaving insensitively with one patient and putting another under inappropriate pressure.

The two women were patients at Taranissi's clinic in Harley Street in 2003 and 2004. One, a 36-year-old vet from Greece, referred to as IK, said she had been told by the IVF specialist that she needed a drug called Humira. After she discovered it was unlicensed for fertility treatment, she refused to take it, but she claimed Taranissi put her under pressure. The woman - who had suffered two miscarriages - claimed he had become angry and told her he could not be held responsible if she had another miscarriage.

The panel found there was insufficient evidence to show Taranissi's behaviour amounted to "inappropriate pressure" or to suggest she was not properly informed about treatment with an unlicensed drug.

The other allegation related to patient CG, who said she had phoned the clinic on August 10 2004 and told the doctor she had been vomiting. Later she arrived at the clinic complaining of sickness and swelling. This later proved symptomatic of a rare condition called hyponatraenia, which eventually led to CG's admission to intensive care. CG's husband called Taranissi and said his wife was vomiting but the doctor was defensive and showed a lack of compassion, it was alleged.

But the panel found Taranissi could not have been expected to diagnose the rare condition and said a defensive attitude was to be expected.

Earlier this month, Taranissi's ARGC recorded the highest success rates among more than 100 clinics offering IVF in Britain, according to figures released by the government's IVF watchdog, the Human Fertilisation and Embryology Authority. Nearly two-thirds of his patients who were under 35 had a live birth in 2006, and his success rate of 61% was almost double the national average of 31% for patients of the same age.